1. /enkw/ or /enk/ ENQuire. The mnemonic for AsCII character 5. 2. An on-line convention for querying someone' s availability. After opening a chat connection to someone apparently in heavy hack mode, one might type "sYN sYN ENQ?" (the sYNs representing notional synchronisation bytes), and expect a return of ACK or NAK depending on whether or not the person felt interruptible. Compare ping, finger. [Jargon File] (1998-01-18)